Reels tagged #ocean

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Ocean

The ocean is deeper than Everest is tall

Challenger Deep plunges about 10,935 metres. Drop Everest into it and more than two kilometres of water would still cover the summit.

#ocean#marianatrench#earth
Animals

Octopuses have three hearts and blue blood

Two hearts pump blood through the gills and one through the body. Copper-based hemocyanin carries their oxygen and turns the blood blue.

#animals#octopus#ocean
Animals

Sharks are older than trees

Sharks have patrolled the oceans for about 450 million years. The first trees appeared roughly 100 million years later — sharks predate Saturn's rings too.

#animals#ocean#sharks
Animals

A blue whale's heart is the size of a small car

It weighs around 180 kg and beats as slowly as twice a minute during deep dives — audible from three kilometres away.

#animals#ocean#whales
Ocean

Most of your oxygen comes from the ocean

Tiny drifting plankton produce an estimated half or more of the oxygen we breathe — every second breath comes from the sea, not the forest.

#ocean#plankton#climate
Physics

Sound travels four times faster in water

Water molecules sit closer together than air molecules, so vibrations pass along faster — about 1,480 m/s versus 343 m/s.

#physics#sound#ocean
Animals

A mantis shrimp punches fast enough to boil water

Its club accelerates like a bullet, and the collapsing bubble left behind briefly reaches thousands of degrees, flashing light. The punch lands even if the strike misses.

#animals#ocean#physics
Animals

A narwhal's tusk is actually a tooth

The spiral tusk is an overgrown left canine that erupts through the lip and can reach three metres. It is packed with millions of nerve endings, making it a giant sensory organ.

#animals#arctic#ocean
Animals

One jellyfish can reverse its own ageing

Turritopsis dohrnii can revert from adult medusa back to its juvenile polyp stage when stressed, restarting its life cycle, in principle indefinitely.

#animals#ocean#biology
Animals

Dolphins sleep with half their brain awake

One hemisphere rests while the other keeps the dolphin surfacing to breathe and watching for danger, with one eye open. They never fully lose consciousness.

#animals#dolphins#ocean
Animals

In seahorses, the male gets pregnant

The female deposits eggs into the male's brood pouch, where he fertilises them, supplies oxygen and nutrients, and then gives birth to hundreds of tiny seahorses.

#animals#seahorse#ocean
Animals

Starfish have no brain and no blood

A sea star runs on a nerve ring instead of a brain and pumps filtered seawater through its body in place of blood. Many can regrow an entire body from one arm.

#animals#ocean#biology
Firsts

The first dive to the deepest sea took 5 hours

In 1960 the bathyscaphe Trieste carried two men nearly 11 km down into the Mariana Trench. The descent took about five hours; they stayed only 20 minutes.

#firsts#ocean#adventure
Geography

Everest would still be underwater in the Mariana Trench

The Challenger Deep reaches nearly 11 km down — over 2 km deeper than Everest is tall.

#geography#ocean#records
Geography

The largest living structure is visible from orbit

The Great Barrier Reef spans over 2,300 km and is built by billions of tiny coral polyps.

#geography#ocean#australia
Geography

The loneliest place on Earth is water

At Point Nemo in the South Pacific, the nearest land is 2,688 km away — astronauts overhead are often the closest humans.

#geography#ocean#records
Biology

Most of the oxygen you breathe came from the ocean

Marine phytoplankton — microscopic drifting algae — produce roughly half of Earth's oxygen, rivalling every forest on land combined.

#biology#ocean#plants
Zoology

A shrimp can shoot a bubble hotter than lava

The pistol shrimp snaps its claw so fast it creates a collapsing cavitation bubble, producing a shockwave, a flash of light and a crack loud enough to stun prey.

#zoology#animals#ocean
Zoology

Sperm whales sleep standing up in the water

They drift vertically in short naps of around ten to fifteen minutes, motionless like floating pillars, holding their breath the whole time.

#zoology#whales#ocean
Zoology

Sea otters hold hands while they sleep

Floating in rafts, otters grip each other — or wrap themselves in kelp — so the current does not carry them apart during the night.

#zoology#animals#ocean
Technology

Almost all international data crosses the seabed

Satellites carry a tiny share — around 99% of intercontinental internet traffic runs through submarine cables, some no thicker than a garden hose.

#technology#internet#ocean
Sports

Freedivers go past 200 metres on one breath

With weighted sleds they descend where lungs compress to a fraction of their size, then ride back up on a balloon.

#sports#freediving#ocean
Sports

Surfers have ridden waves as tall as an eight-storey building

Nazare in Portugal funnels swell up an underwater canyon, producing rides measured above 26 metres.

#sports#surfing#ocean
Mythology

The kraken legend may come from real squid

Norwegian sailors described an island-sized beast that dragged ships under. Modern biologists point to the giant squid, which can exceed 12 metres and was only filmed alive in 2004.

#mythology#kraken#ocean